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https://issues.apache.org/jira/browse/MAPREDUCE-5905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14526293#comment-14526293
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Tsuyoshi Ozawa commented on MAPREDUCE-5905:
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+1, committing this shortly. This patch fixes a mistake about the management of
array indices.
Before the fix:
{quote}
{(group1)(group1)[(counter1)(counter1)(45)][(counter2)(counter2)(45)][(counter\{\}\(\)\[\])(counter\{\}\(\)\[\])(45)]}{(group2)(group2)[(counter1)(counter1)(45)][(counter2)(counter2)(45)][(counter\{\}\(\)\[\])(counter\{\}\(\)\[\])(45)]}{(group\{\}\(\)\[\])(group\{\}\(\)\[\])[(counter1)(counter1)(45)][(counter2)(counter2)(45)][(counter\{\}\(\)\[\])(counter\{\}\(\)\[\])(45)]}nullnullnullnullnullnull
{quote}
After the fix:
{quote}
{(group1)(group1)[(counter1)(counter1)(45)][(counter2)(counter2)(45)][(counter\{\}\(\)\[\])(counter\{\}\(\)\[\])(45)]}{(group2)(group2)[(counter1)(counter1)(45)][(counter2)(counter2)(45)][(counter\{\}\(\)\[\])(counter\{\}\(\)\[\])(45)]}{(group\{\}\(\)\[\])(group\{\}\(\)\[\])[(counter1)(counter1)(45)][(counter2)(counter2)(45)][(counter\{\}\(\)\[\])(counter\{\}\(\)\[\])(45)]}
{quote}
> CountersStrings.toEscapedCompactStrings outputs unnecessary "null" strings
> --------------------------------------------------------------------------
>
> Key: MAPREDUCE-5905
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5905
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.4.0, 2.7.0
> Reporter: Akira AJISAKA
> Assignee: Akira AJISAKA
> Priority: Minor
> Attachments: MAPREDUCE-5905.patch
>
>
> CountersStrings.toEscapedCompactStrings outputs "null" strings if a
> CounterGroup has more than one Counter.
> That way there are some "null" strings in MRv1(CDH) job history log.
> https://issues.cloudera.org/browse/DISTRO-598
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